[Tommy takes the time they're walking to get a good look at Billy. He's different than the Billy he knew and he kind of hates it. He spent the better part of his life without his brother. Then he gets him, and he goes off somewhere and grows up without him.

He stops moving. For a second, he knows he's misheard. It hadn't crossed his mind that Teddy wasn't around somewhere, and he was nowhere near thinking that Billy had moved on.]

But. Teddy's not here? You and Teddy aren't..?

[He turns to face Billy, hands raised in confusion, dropping them to his side. Tommy looks hurt for a moment, for a bunch of reasons, and then the expression is wiped clean. He'd always assumed Billy and Teddy would be together forever. The idea of Billy being with someone else bothers him.]

That's great. Good for you finding someone new. [His tone falls short of supportive, so he tries again.] I mean, you shouldn't be alone. Teddy wouldn't want that.